ABB CL Series, Руководство по применению

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Wiring with the display system
152
1SVC 440 795 M1100
Analog value comparator/threshold value switch
The display system provides 32 analog value comparators
A 01 to A 32.
With an analog value comparator or threshold value switch
you can, for example, compare analog input values with a
set value.
All display system DC variants have analog inputs.
The following comparisons are possible:
• Function block input
>I1
greater than/equal to, equal
to, less than/equal to function block input
>I2
• Using the factors
>F1
and
>F2
as inputs enables you to
amplify and adjust the values of the function block inputs.
• Function block input
>OS
can be used as an offset for
input
>I1
.
• Function block input
>HY
is used as a positive and negative
switching hysteresis of the
>I2
. The contact switches
according to the comparison mode of the function block.
Figure: 95: Display system circuit diagram with analog value
comparators
h
Attention!
The function blocks are designed in such a way that a
function block output can be assigned directly to the input
of another function block. This enables you always to have
an overview of which value is transferred.
If different data formats are used, such as if the first
function block uses 32 bits and an 8-bit or 16-bit format is
used for further processing, sign value errors or value
errors may occur when transferring from one function
block to another one.
I 01----A 01Q1-----------------Ä Q 01
I 02--u-A 02Q1-----------------S Q 02
h-A 03Q1-----------------R Q 03